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# This is a generated file! Please edit source .ksy file and use kaitai-struct-compiler to rebuild
from pkg_resources import parse_version
from .kaitaistruct import __version__ as ks_version, KaitaiStruct, KaitaiStream, BytesIO
from enum import Enum
import collections
if parse_version(ks_version) < parse_version('0.7'):
raise Exception("Incompatible Kaitai Struct Python API: 0.7 or later is required, but you have %s" % (ks_version))
class Asn1Der(KaitaiStruct):
"""ASN.1 (Abstract Syntax Notation One) DER (Distinguished Encoding
Rules) is a standard-backed serialization scheme used in many
different use-cases. Particularly popular usage scenarios are X.509
certificates and some telecommunication / networking protocols.
DER is self-describing encoding scheme which allows representation
of simple, atomic data elements, such as strings and numbers, and
complex objects, such as sequences of other elements.
DER is a subset of BER (Basic Encoding Rules), with an emphasis on
being non-ambiguous: there's always exactly one canonical way to
encode a data structure defined in terms of ASN.1 using DER.
This spec allows full parsing of format syntax, but to understand
the semantics, one would typically require a dictionary of Object
Identifiers (OIDs), to match OID bodies against some human-readable
list of constants. OIDs are covered by many different standards,
so typically it's simpler to use a pre-compiled list of them, such
as:
* https://www.cs.auckland.ac.nz/~pgut001/dumpasn1.cfg
* http://oid-info.com/
* https://www.alvestrand.no/objectid/top.html
.. seealso::
Source - https://www.itu.int/rec/T-REC-X.690-201508-I/en
"""
class TypeTag(Enum):
end_of_content = 0
boolean = 1
integer = 2
bit_string = 3
octet_string = 4
null_value = 5
object_id = 6
object_descriptor = 7
external = 8
real = 9
enumerated = 10
embedded_pdv = 11
utf8string = 12
relative_oid = 13
sequence_10 = 16
printable_string = 19
ia5string = 22
sequence_30 = 48
set = 49
SEQ_FIELDS = ["type_tag", "len", "body"]
def __init__(self, _io, _parent=None, _root=None):
self._io = _io
self._parent = _parent
self._root = _root if _root else self
self._debug = collections.defaultdict(dict)
def _read(self):
self._debug['type_tag']['start'] = self._io.pos()
self.type_tag = KaitaiStream.resolve_enum(self._root.TypeTag, self._io.read_u1())
self._debug['type_tag']['end'] = self._io.pos()
self._debug['len']['start'] = self._io.pos()
self.len = self._root.LenEncoded(self._io, self, self._root)
self.len._read()
self._debug['len']['end'] = self._io.pos()
self._debug['body']['start'] = self._io.pos()
_on = self.type_tag
if _on == self._root.TypeTag.printable_string:
self._raw_body = self._io.read_bytes(self.len.result)
io = KaitaiStream(BytesIO(self._raw_body))
self.body = self._root.BodyPrintableString(io, self, self._root)
self.body._read()
elif _on == self._root.TypeTag.sequence_10:
self._raw_body = self._io.read_bytes(self.len.result)
io = KaitaiStream(BytesIO(self._raw_body))
self.body = self._root.BodySequence(io, self, self._root)
self.body._read()
elif _on == self._root.TypeTag.set:
self._raw_body = self._io.read_bytes(self.len.result)
io = KaitaiStream(BytesIO(self._raw_body))
self.body = self._root.BodySequence(io, self, self._root)
self.body._read()
elif _on == self._root.TypeTag.sequence_30:
self._raw_body = self._io.read_bytes(self.len.result)
io = KaitaiStream(BytesIO(self._raw_body))
self.body = self._root.BodySequence(io, self, self._root)
self.body._read()
elif _on == self._root.TypeTag.utf8string:
self._raw_body = self._io.read_bytes(self.len.result)
io = KaitaiStream(BytesIO(self._raw_body))
self.body = self._root.BodyUtf8string(io, self, self._root)
self.body._read()
elif _on == self._root.TypeTag.object_id:
self._raw_body = self._io.read_bytes(self.len.result)
io = KaitaiStream(BytesIO(self._raw_body))
self.body = self._root.BodyObjectId(io, self, self._root)
self.body._read()
else:
self.body = self._io.read_bytes(self.len.result)
self._debug['body']['end'] = self._io.pos()
class BodySequence(KaitaiStruct):
SEQ_FIELDS = ["entries"]
def __init__(self, _io, _parent=None, _root=None):
self._io = _io
self._parent = _parent
self._root = _root if _root else self
self._debug = collections.defaultdict(dict)
def _read(self):
self._debug['entries']['start'] = self._io.pos()
self.entries = []
i = 0
while not self._io.is_eof():
if not 'arr' in self._debug['entries']:
self._debug['entries']['arr'] = []
self._debug['entries']['arr'].append({'start': self._io.pos()})
_t_entries = Asn1Der(self._io)
_t_entries._read()
self.entries.append(_t_entries)
self._debug['entries']['arr'][len(self.entries) - 1]['end'] = self._io.pos()
i += 1
self._debug['entries']['end'] = self._io.pos()
class BodyUtf8string(KaitaiStruct):
SEQ_FIELDS = ["str"]
def __init__(self, _io, _parent=None, _root=None):
self._io = _io
self._parent = _parent
self._root = _root if _root else self
self._debug = collections.defaultdict(dict)
def _read(self):
self._debug['str']['start'] = self._io.pos()
self.str = (self._io.read_bytes_full()).decode(u"UTF-8")
self._debug['str']['end'] = self._io.pos()
class BodyObjectId(KaitaiStruct):
"""
.. seealso::
Source - https://docs.microsoft.com/en-us/windows/desktop/SecCertEnroll/about-object-identifier
"""
SEQ_FIELDS = ["first_and_second", "rest"]
def __init__(self, _io, _parent=None, _root=None):
self._io = _io
self._parent = _parent
self._root = _root if _root else self
self._debug = collections.defaultdict(dict)
def _read(self):
self._debug['first_and_second']['start'] = self._io.pos()
self.first_and_second = self._io.read_u1()
self._debug['first_and_second']['end'] = self._io.pos()
self._debug['rest']['start'] = self._io.pos()
self.rest = self._io.read_bytes_full()
self._debug['rest']['end'] = self._io.pos()
@property
def first(self):
if hasattr(self, '_m_first'):
return self._m_first if hasattr(self, '_m_first') else None
self._m_first = self.first_and_second // 40
return self._m_first if hasattr(self, '_m_first') else None
@property
def second(self):
if hasattr(self, '_m_second'):
return self._m_second if hasattr(self, '_m_second') else None
self._m_second = (self.first_and_second % 40)
return self._m_second if hasattr(self, '_m_second') else None
class LenEncoded(KaitaiStruct):
SEQ_FIELDS = ["b1", "int2", "int1"]
def __init__(self, _io, _parent=None, _root=None):
self._io = _io
self._parent = _parent
self._root = _root if _root else self
self._debug = collections.defaultdict(dict)
def _read(self):
self._debug['b1']['start'] = self._io.pos()
self.b1 = self._io.read_u1()
self._debug['b1']['end'] = self._io.pos()
if self.b1 == 130:
self._debug['int2']['start'] = self._io.pos()
self.int2 = self._io.read_u2be()
self._debug['int2']['end'] = self._io.pos()
if self.b1 == 129:
self._debug['int1']['start'] = self._io.pos()
self.int1 = self._io.read_u1()
self._debug['int1']['end'] = self._io.pos()
@property
def result(self):
if hasattr(self, '_m_result'):
return self._m_result if hasattr(self, '_m_result') else None
self._m_result = (self.int1 if self.b1 == 129 else (self.int2 if self.b1 == 130 else self.b1))
return self._m_result if hasattr(self, '_m_result') else None
class BodyPrintableString(KaitaiStruct):
SEQ_FIELDS = ["str"]
def __init__(self, _io, _parent=None, _root=None):
self._io = _io
self._parent = _parent
self._root = _root if _root else self
self._debug = collections.defaultdict(dict)
def _read(self):
self._debug['str']['start'] = self._io.pos()
self.str = (self._io.read_bytes_full()).decode(u"ASCII")
self._debug['str']['end'] = self._io.pos()
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